.It was not until he arrived in class _____ realized he had forgotten his book.
问题描述：
.It was not until he arrived in class _____ realized he had forgotten his book.
A.and he
B.when he
C.he
D.that he
麻烦详细分析下
答
选D.考查强调句的否定结构.直到他走进课堂他才意识到忘记带书了.其他选项麻烦解释下其他选项跟这个句子的意思和结构都不想干！都属于干扰项。